Kinetic Alfven waves in extended radio sources

Details Kinetic Alfven waves in extended radio sources Kinetic Alfven waves in extended radio sources

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987ap%26ss.137..303j&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 137, no. 2, Oct. 1987, p. 303-315. Research supported by the Fundacao de A

Astronomy and Astrophysics

Astronomy

14

Astronomical Models, Magnetohydrodynamic Waves, Radio Sources (Astronomy), Cosmic Plasma, Kinetic Equations

Scientific paper

The authors study a model of extended radio sources (ERS), in particular, extragalactic jets and radio lobes, which are inhomogeneous and where noncompressive Alfvén and surface Alfvén waves (and not shocks and magnetosonic waves) are primarily excited. It is assumed that a negligible thermal population exists (i.e., the ion density at the low-energy cut-off of the power law distribution is greater than the ion density of the thermal population, if present). Due to internal instabilities and/or the interaction of the ERS with the ambient medium, surface Alfvén waves (SAW) are created. The authors show that even very small amplitude SAW are mode converted to kinetic Alfvén waves (KAW) which produce large moving accelerating potentials ψ, parallel to the magnetic field.

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